CN103867155A - Expansion pipe - Google Patents
Expansion pipe Download PDFInfo
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- CN103867155A CN103867155A CN201410136294.0A CN201410136294A CN103867155A CN 103867155 A CN103867155 A CN 103867155A CN 201410136294 A CN201410136294 A CN 201410136294A CN 103867155 A CN103867155 A CN 103867155A
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- pipeline section
- expansion
- pipe
- pipe nipple
- jumper
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- 210000002445 nipple Anatomy 0.000 claims description 148
- 238000010030 laminating Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 5
- 238000003801 milling Methods 0.000 abstract description 26
- 238000007789 sealing Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
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Abstract
The invention provides an expansion pipe which comprises an upper expansion short piece with a first pipe section and a second pipe section, a lower expansion short piece with a third pipe section, a fourth pipe section and a fifth pipe section and a first jumper pipe. The inner diameter of the first pipe section is smaller than the outer diameter of an expansion cone. The outer diameter of the first pipe section is smaller than the inner diameter of a sleeve pipe of a patching well. A first elastic sealing ring is arranged outside the first pipe section in a sleeved mode. After the first pipe section expands, the first pipe section is attached with the sleeve pipe in a sealing mode through the first elastic sealing ring. The inner diameter of the fourth pipe section is smaller than the outer diameter of the expansion cone, the outer diameter of the fourth pipe section is smaller than the inner diameter of the sleeve pipe, a second elastic sealing ring is arranged outside the fourth pipe section in a sleeved mode, and after the fourth pipe section expands, the fourth pipe section is attached with the sleeve in a sealing mode through the second elastic sealing ring. The upper end of the first jumper pipe is in thread connection with the second pipe section, the lower end of the first jumper pipe is in thread connection with the third pipe section, the inner diameter of the first jumper is not smaller than the outer diameter of the expansion cone, and the outer diameter of the first jumper is smaller than the inner diameter of the sleeve pipe. When the expansion pipe needs to be taken out, only the upper expansion short piece and the lower expansion short piece are milled off, milling workload is lowered, the taking-out difficulty of the expansion pipe after patching is lowered, and then the working efficiency of casing damage well repairing is improved.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly, relate to a kind of expansion tube.
Background technology
In oil exploitation process, Casing Failure is often damaged, using expansion tube to subsidize the sleeve pipe damaging is conventional at present a kind of restorative procedure, its principle is to have under the metal steel pipe of some strength and elongation in well, alignment sleeve damaged location, makes steel pipe generation expanded radially by hydraulic pressure or mechanical force, subsidizes after expansion on damaged internal surface of sleeve pipe, the flexible seal of expansion tube outside forms sealing to casing leakage point, recovers oil-water well and normally produces.
Although utilize expandable casing patching to there is the advantages such as sealing is reliable, period of validity is long, subsidy section latus rectum is large, but in some cases, as when subsidizing the subsidy section of well, new cover damage occurred below again, need to again subsidize time, just the expansion tube of subsidy before need to be taken out.But, axially all produce expanded radially because expansion tube is whole, so can only utilize milling tool to remove mill bit by bit, all expansion tubes of subsidy section are all ground off; Because subsidy section is longer, milling workload is larger again, and then has strengthened the taking-up difficulty of expansion tube after subsidy, has affected the operating efficiency that casing damaged well is repaired.
In addition, because expansion tube all produces expanded radially whole period of when subsidy, thus require the casing inner diameter size of whole subsidy section all to reach the more than 98% of former internal diameter size, and then the intractability that causes cover to damage passage increases, workload is larger; Once subsidy section internal diameter size does not reach standard, and engineering accident will occur, and the very difficult processing of this accident, even can cause scrapping of well, economic loss is very large.Meanwhile, because expandable casing patching need to all expand the expansion tube of whole section, expansion length is longer, and engineering accident more easily occurs in expansion process; And connecting thread between pipeline section also can follow together and expand, sealing is poor, can not be used for gas well subsidy, has limited application scale.
In sum, how to reduce the taking-up difficulty of the rear expansion tube of subsidy, the operating efficiency of repairing to improve casing damaged well, is current those skilled in the art technical problems urgently to be resolved hurrily.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of expansion tube, to reduce the taking-up difficulty of the rear expansion tube of subsidy, and then improve the operating efficiency that casing damaged well is repaired.
In order to achieve the above object, the invention provides following technical scheme:
A kind of expansion tube, comprising:
Upper expansion pipe nipple, described upper expansion pipe nipple has the first pipeline section and the second pipeline section, the internal diameter of described the first pipeline section is less than the external diameter of expansion cone, the external diameter of described the first pipeline section is less than the casing inner diameter of subsidizing well, described the first pipeline section overcoat has the first elastic seal ring, and described the first pipeline section expands rear by described the first elastic seal ring and bobbin seal laminating; The internal diameter of described the second pipeline section is not less than the external diameter of described expansion cone, and the external diameter of described the second pipeline section is less than the internal diameter of described sleeve pipe, and the inner chamber of described the second pipeline section forms the pressurizing chamber while expansion;
Lower expansion pipe nipple, described lower expansion pipe nipple has the 3rd pipeline section, the 4th pipeline section and the 5th pipeline section, the internal diameter of the internal diameter of described the 3rd pipeline section and described the 5th pipeline section is all not less than the external diameter of described expansion cone, the external diameter of the external diameter of described the 3rd pipeline section and described the 5th pipeline section is all less than the internal diameter of described sleeve pipe, and the inner chamber of described the 5th pipeline section forms the pressurizing chamber while expansion; The internal diameter of described the 4th pipeline section is less than the external diameter of described expansion cone, the external diameter of described the 4th pipeline section is less than the internal diameter of described sleeve pipe, described the 4th pipeline section overcoat has the second elastic seal ring, and described the 4th pipeline section expands rear by described the second elastic seal ring and described bobbin seal laminating;
The first jumper pipe, the upper end of described the first jumper pipe is threaded with described the second pipeline section, the lower end of described the first jumper pipe is threaded with described the 3rd pipeline section, the internal diameter of described the first jumper pipe is not less than the external diameter of described expansion cone, and the external diameter of described the first jumper pipe is less than the internal diameter of described sleeve pipe.
Preferably, above-mentioned expansion tube also comprises:
Be arranged on the middle expansion pipe nipple between described upper expansion pipe nipple and described lower expansion pipe nipple, described middle expansion pipe nipple has the 6th pipeline section, the 7th pipeline section and the 8th pipeline section, the internal diameter of the internal diameter of described the 6th pipeline section and described the 8th pipeline section is all not less than the external diameter of described expansion cone, the external diameter of the external diameter of described the 6th pipeline section and described the 8th pipeline section is all less than the internal diameter of described sleeve pipe, and the inner chamber of described the 8th pipeline section forms the pressurizing chamber while expansion; The internal diameter of described the 7th pipeline section is less than the external diameter of described expansion cone, the external diameter of described the 7th pipeline section is less than the internal diameter of described sleeve pipe, described the 7th pipeline section overcoat has the 3rd elastic seal ring, and after described the 7th pipeline section expands,, by described the 3rd elastic seal ring and described bobbin seal laminating, the lower end of described the first jumper pipe is threaded with described the 6th pipeline section;
Be arranged on the second jumper pipe between described lower expansion pipe nipple and described middle expansion pipe nipple, the upper end of described the second jumper pipe is threaded with described the 8th pipeline section, and the lower end of described the second jumper pipe is threaded with described the 3rd pipeline section.
Preferably, in above-mentioned expansion tube, the internal diameter of described the first jumper pipe, described the second jumper pipe, described the 3rd pipeline section and described the 6th pipeline section is identical respectively with external diameter.
Preferably, in above-mentioned expansion tube, the internal diameter of described the first pipeline section, described the 4th pipeline section and described the 7th pipeline section is identical respectively with external diameter.
Preferably, in above-mentioned expansion tube, the internal diameter of described the second pipeline section, described the 5th pipeline section and described the 8th pipeline section is identical respectively with external diameter.
Preferably, in above-mentioned expansion tube, described upper expansion pipe nipple, described lower expansion pipe nipple, described middle expansion pipe nipple, described the first jumper pipe and described the second jumper pipe are metal steel pipe.
Preferably, in above-mentioned expansion tube, the length of described upper expansion pipe nipple, described lower expansion pipe nipple, described middle expansion pipe nipple is all less than 1m;
The length of described the first jumper pipe and described the second jumper pipe is 3m-12m.
Preferably, in above-mentioned expansion tube, the screw thread on described upper expansion pipe nipple, described lower expansion pipe nipple, described middle expansion pipe nipple, described the first jumper pipe and described the second jumper pipe is tightness screw thread.
Preferably, in above-mentioned expansion tube, described the first elastic seal ring, described the second elastic seal ring, described the 3rd elastic seal ring are rubber seal, and three is 2-10.
Preferably, in above-mentioned expansion tube, described upper expansion pipe nipple and described lower expansion pipe nipple are one;
Described middle expansion pipe nipple is multiple, and connects by described the second jumper pipe between two adjacent described middle expansion pipe nipples.
Can find out from above-mentioned technical scheme, expansion tube provided by the invention comprises expansion pipe nipple, lower expansion pipe nipple and the first jumper pipe, wherein, upper expansion pipe nipple has the first pipeline section and the second pipeline section, the internal diameter of the first pipeline section is less than the external diameter of expansion cone, the external diameter of the first pipeline section is less than the casing inner diameter of subsidizing well, and the first pipeline section overcoat has the first elastic seal ring, and the first pipeline section expands rear by the first elastic seal ring and bobbin seal laminating; The internal diameter of the second pipeline section is not less than the external diameter of expansion cone, and the external diameter of the second pipeline section is less than the internal diameter of sleeve pipe, and the inner chamber of the second pipeline section forms the pressurizing chamber while expansion; Lower expansion pipe nipple has the 3rd pipeline section, the 4th pipeline section and the 5th pipeline section, the internal diameter of the internal diameter of the 3rd pipeline section and the 5th pipeline section is all not less than the external diameter of expansion cone, the external diameter of the external diameter of the 3rd pipeline section and the 5th pipeline section is all less than the internal diameter of sleeve pipe, and the inner chamber of the 5th pipeline section forms the pressurizing chamber while expansion; The internal diameter of the 4th pipeline section is less than the external diameter of expansion cone, and the external diameter of the 4th pipeline section is less than the internal diameter of sleeve pipe, and the 4th pipeline section overcoat has the second elastic seal ring, and the 4th pipeline section expands rear by the second elastic seal ring and bobbin seal laminating; The upper end of the first jumper pipe is threaded with the second pipeline section, and the lower end, upper end of the first jumper pipe is threaded with the 3rd pipeline section, and the internal diameter of the first jumper pipe is not less than the external diameter of expansion cone, and the external diameter of the first jumper pipe is less than the internal diameter of sleeve pipe.
The operating process that utilizes expansion tube of the present invention to repair sleeve pipe is as follows:
First in the pressurizing chamber (i.e. the inner chamber of the 5th pipeline section) of lower expansion pipe nipple, put into expansion cone, then by the stifled the end above-mentioned pressurizing chamber bottom that is arranged on; Then assemble successively according to the order of lower expansion pipe nipple, the first jumper pipe, upper expansion pipe nipple from bottom to top; Then dock with expansion cone with delivering oil pipe;
Then the casing failure position of the expansion tube assembling being gone into the well, then in delivery oil pipe, pump into clear water and beat high pressure, now pressure can act on the bottom surface of expansion cone, promote that it is up, in up process, the 4th pipeline section is radially swollen and subsidized on internal surface of sleeve pipe by the second elastic seal ring; When expansion cone is up to the 3rd pipeline section place in lower expansion pipe nipple, pressure declines suddenly, proves that the 4th pipeline section expands complete; Now, carry and deliver oil pipe and make expansion cone enter upper level pressurizing chamber namely in the inner chamber of the second pipeline section, continue pump water and suppress, make the swollen mistake of expansion cone the first pipeline section radially be swollen and subsidize on internal surface of sleeve pipe by the first elastic seal ring; Swollenly trip out expansion cone after complete, it is stifled that running string is salvaged or milling breaks off the base, and can complete subsidy operation.
In the time that the expansion tube after subsidy need to take out, be first lowered to milling tool milling and fall upper expansion pipe nipple, be then lowered to back-off fishing string, the first jumper pipe is opened and pulled out, then expansion pipe nipple is fallen down in milling, can complete and take out expansion tube operation.
In summary, when expansion tube of the present invention need to take out, only need milling to fall upper expansion pipe nipple and lower expansion pipe nipple, reduced milling workload, thereby reduced the taking-up difficulty of expansion tube after subsidy, and then improved the operating efficiency that casing damaged well is repaired.
Simultaneously, the present invention when subsidy only need respectively on the expand part pipeline section of pipe nipple and lower expansion pipe nipple carry out expanded radially, and sleeve position corresponding to above-mentioned expansion pipe nipple is intact section, what jumper pipe was corresponding is that cover damages position, because jumper pipe is without expansion, as long as so the internal diameter size of this section of sleeve pipe be a bit larger tham jumper pipe external diameter namely jumper pipe can be from then on section by, and then reduced the intractability of cover damage passage, reduced workload; Shortened expansion tube needs the length of expanded radially simultaneously, can reduce the factor that engineering accident occurs in expansion process, thereby has reduced construction risk and difficulty.
Meanwhile, expansion tube of the present invention does not expand in the section of being threaded, and the sealing of expansion tube is better, has ensured subsidy quality.
In addition, the jumper pipe that the present invention salvages in the time getting expansion tube can also re-use, and saves cost.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the expansion tube structural representation that the embodiment of the present invention provides;
Fig. 2 is the local amplification assumption diagram of A in Fig. 1;
Fig. 3 is the local amplification assumption diagram of B in Fig. 1;
Fig. 4 is the local amplification assumption diagram of C in Fig. 1.
In upper Fig. 1-4:
1 for upper expansion pipe nipple, 2 for middle expansion pipe nipple, 3 for lower expansion pipe nipple, 4 be the first jumper pipe, 5 for expansion cone, 6 for the end, is stifled, 7 for delivery oil pipe, 8 be that the first elastic seal ring, 9 is that the 3rd elastic seal ring, 10 is that the second elastic seal ring, 11 is the second jumper pipe.
Detailed description of the invention
The embodiment of the present invention provides a kind of expansion tube, has reduced the taking-up difficulty of expansion tube after subsidy, and then has improved the operating efficiency that casing damaged well is repaired.
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to accompanying drawing 1-4, the expansion tube that the embodiment of the present invention provides comprises expansion pipe nipple 1, lower expansion pipe nipple 3 and the first jumper pipe 4, wherein, upper expansion pipe nipple 1 has the first pipeline section and the second pipeline section, the internal diameter of the first pipeline section is less than the external diameter of expansion cone 5, the external diameter of the first pipeline section is less than the casing inner diameter of subsidizing well, and the first pipeline section overcoat has the first elastic seal ring 8, and the first pipeline section expands rear by the first elastic seal ring 8 and bobbin seal laminating; The internal diameter of the second pipeline section is not less than the external diameter of expansion cone 5, and the external diameter of the second pipeline section is less than the internal diameter of sleeve pipe, and the inner chamber of the second pipeline section forms the pressurizing chamber while expansion; Lower expansion pipe nipple 3 has the 3rd pipeline section, the 4th pipeline section and the 5th pipeline section, the internal diameter of the internal diameter of the 3rd pipeline section and the 5th pipeline section is all not less than the external diameter of expansion cone 5, the external diameter of the external diameter of the 3rd pipeline section and the 5th pipeline section is all less than the internal diameter of sleeve pipe, and the inner chamber of the 5th pipeline section forms the pressurizing chamber while expansion; The internal diameter of the 4th pipeline section is less than the external diameter of expansion cone 5, and the internal diameter external diameter of the 4th pipeline section is less than the internal diameter of sleeve pipe, and the 4th pipeline section overcoat has the second elastic seal ring 10, and the 4th pipeline section expands rear by the second elastic seal ring 10 and bobbin seal laminating; The upper end of the first jumper pipe 4 is threaded with the second pipeline section, and the lower end of the first jumper pipe 4 is threaded with the 3rd pipeline section, and the internal diameter of the first jumper pipe 4 is not less than the external diameter of expansion cone 5, and the external diameter of the first jumper pipe 4 is less than the internal diameter of sleeve pipe.That is to say, upper expansion pipe nipple 1 of the present invention comprises path section (the first pipeline section) and large footpath section (the second pipeline section), and lower expansion pipe nipple 3 is that large middle footpath, footpath, two ends is little.
The operating process that utilizes the expansion tube of the embodiment of the present invention to repair sleeve pipe is as follows:
First in the pressurizing chamber (i.e. the inner chamber of the 5th pipeline section) of lower expansion pipe nipple 3, put into expansion cone 5, then the end stifled 6 is arranged on to above-mentioned pressurizing chamber bottom; Then assemble successively according to the order of lower expansion pipe nipple 3, the first jumper pipe 4, upper expansion pipe nipple 1 from bottom to top; Then dock with expansion cone 5 with delivering oil pipe 7;
Then the casing failure position of the expansion tube assembling being gone into the well, then in delivery oil pipe 7, pump into clear water and beat high pressure, now pressure can act on the bottom surface of expansion cone 5, promote that it is up, in up process, the 4th pipeline section radially swollen and subsidize on internal surface of sleeve pipe by the second elastic seal ring 10; When expansion cone 5 is up to the 3rd pipeline section place in lower expansion pipe nipple 3, pressure declines suddenly, proves that the 4th pipeline section expands complete; Now, carry and deliver oil pipe 7 and make expansion cone 5 enter upper level pressurizing chamber namely in the inner chamber of the second pipeline section, continue pump water and suppress, make the swollen mistake of expansion cone 5 the first pipeline section radially be swollen and subsidize on internal surface of sleeve pipe by the first elastic seal ring 8; Swollenly trip out expansion cone 5 after complete, it is stifled 6 that running string is salvaged or milling breaks off the base, and can complete subsidy operation.
In the time that the expansion tube after subsidy need to take out, be first lowered to milling tool milling and fall upper expansion pipe nipple 1, be then lowered to back-off fishing string, the first jumper pipe 4 is opened and pulled out, then expansion pipe nipple 3 is fallen down in milling, can complete and take out expansion tube operation.
In summary, when expansion tube of the present invention need to take out, only need milling to fall upper expansion pipe nipple 1 and lower expansion pipe nipple 3, reduced milling workload, thereby reduced the taking-up difficulty of expansion tube after subsidy, and then improved the operating efficiency that casing damaged well is repaired.
Simultaneously, the present invention when subsidy only need respectively on the expand part pipeline section of pipe nipple 1 and lower expansion pipe nipple 3 carry out expanded radially, and sleeve position corresponding to above-mentioned expansion pipe nipple is intact section, what jumper pipe was corresponding is that cover damages position, because jumper pipe is without expansion, as long as so the internal diameter size of this section of sleeve pipe be a bit larger tham jumper pipe external diameter namely jumper pipe can be from then on section by, and then reduced the intractability of cover damage passage, reduced workload; Shortened expansion tube needs the length of expanded radially simultaneously, can reduce the factor that engineering accident occurs in expansion process, thereby has reduced construction risk and difficulty.
Meanwhile, expansion tube of the present invention does not expand in the section of being threaded, and the sealing of expansion tube is better, has ensured subsidy quality.
In addition, the jumper pipe that the present invention salvages in the time getting expansion tube can also re-use, and saves cost.
In the present invention's one specific embodiment, expansion tube also comprise be arranged on the middle expansion pipe nipple 2 between expansion pipe nipple 1 and lower expansion pipe nipple 3 and be arranged on lower expansion pipe nipple 3 and middle expansion pipe nipple 2 between the second jumper pipe 11; Middle expansion pipe nipple 2 has the 6th pipeline section, the 7th pipeline section and the 8th pipeline section, the internal diameter of the internal diameter of the 6th pipeline section and the 8th pipeline section is all not less than the external diameter of expansion cone 5, the external diameter of the external diameter of the 6th pipeline section and the 8th pipeline section is all less than the internal diameter of sleeve pipe, and the inner chamber of the 8th pipeline section forms the pressurizing chamber while expansion; The internal diameter of the 7th pipeline section is less than the external diameter of expansion cone 5, the external diameter of the 7th pipeline section is less than the internal diameter of sleeve pipe, the 7th pipeline section overcoat has the 3rd elastic seal ring 9, and fits by the 3rd elastic seal ring 9 and bobbin seal after the expansion of the 7th pipeline section, and the lower end of the first jumper pipe 4 is threaded with the 6th pipeline section; The upper end of the second jumper pipe 11 is threaded with the 8th pipeline section, and the lower end of the second jumper pipe 11 is threaded with the 3rd pipeline section.The large middle footpath, footpath, two ends that is above-mentioned middle expansion pipe nipple 2 is little, and the present invention makes the lower end of the first jumper pipe 4 indirectly be formed and be threaded with the 3rd pipeline section by middle expansion pipe nipple 2, the second jumper pipe 11.
After upper expansion pipe nipple 1 of the present invention, lower expansion pipe nipple 3 and middle expansion pipe nipple 2 expand, can fit with internal surface of sleeve pipe sealing respectively, two leak points on repairing casing, have improved operating efficiency simultaneously.
It will be appreciated by persons skilled in the art that the present invention can also not arrange middle expansion pipe nipple 2, now utilize lower expansion pipe nipple 3, the first jumper pipe 4, upper expansion pipe nipple 1 to fit together successively from bottom to top composition single-stage cross-over connection expansion tube; In this single-stage cross-over connection expansion tube, the first jumper pipe 4 is multiple, should be according to the first jumper pipe 4 of the suitable number of different choice of subsidy segment length.
The assemble method of the expansion tube of the present embodiment is:
First in lower expansion pipe nipple 3 pressurizing chambers, put into expansion cone 5, then the end stifled 6 is arranged on to this pressurizing chamber bottom; Then also can repeat to connect for expansion pipe nipple 2, the first jumper pipe 4, middle expansion pipe nipple 2 in repeatedly according to lower expansion pipe nipple 3, the second jumper pipe 11, middle expansion pipe nipple 2(from bottom to top), the order of the first jumper pipe 4, upper expansion pipe nipple 1 is threaded connection and fits together successively; Finally dock with expansion cone 5 with delivering oil pipe 7.
In the combination of above-mentioned expansion tube, upper expansion pipe nipple 1 and lower expansion pipe nipple 3 are one, and middle expansion pipe nipple 2 is multiple, and expand and connect by the second jumper pipe 11 between pipe nipple 2 in adjacent two; Between upper expansion pipe nipple 1 and middle expansion pipe nipple 2, in two, expand between pipe nipple 2, be at least connected a jumper pipe between middle expansion pipe nipple 2 and lower expansion pipe nipple 3, spacing is different separately.
According to on-the-spot needs, the quantity of expand in can reducing or increase between upper expansion pipe nipple 1 and lower expansion pipe nipple 3 pipe nipple 2 and the second jumper pipe 11, forms multistage cross-over connection expansion tube.Concrete, as shown in Figure 1, the present invention uses in one, expand pipe nipple 2 and second jumper pipe 11, forms secondary cross-over connection expansion tube.
Be understandable that, the invention provides expansion tube structure and be not limited to and use three sections of expansion pipe nipples, except upper expansion pipe nipple 1 and lower expansion pipe nipple 3 is each use 1, according to the increase and decrease of middle expansion pipe nipple 2, can form 2 grades, 3 grades ... .n level expansion tube.
While going into the well application, expansion tube is gone into the well on shaft mouth side assembling limit according to the method described above.Lower behind design position, pump into clear water and beat high pressure from delivering oil pipe 7 on ground, pressure-acting promotes on expansion cone 5 bottom surfaces that it is up, in up process, lower expansion pipe nipple 3 is radially swollen and is subsidized on internal surface of sleeve pipe.When expansion cone 5 is up to large footpath place in lower expansion pipe nipple 3, pressure declines suddenly, proves that the 4th pipeline section expands complete.Now, carry and deliver oil pipe 7 and make expansion cone 5 enter upper level pressurizing chamber namely in the inner chamber of the 8th pipeline section, continue pump water and suppress, expansion cone 5 is radially swollen the 7th pipeline section, and subsidize on internal surface of sleeve pipe by the 3rd elastic seal ring 9; Upper lifting pipe post, pump water are suppressed so repeatedly, until the first pipeline section is expanded complete; Swollenly trip out expansion cone 5 after complete, it is stifled 6 that running string is salvaged or milling breaks off the base, and completes subsidy operation.
In the time needing to take out after expandable casing patching, first be lowered to milling tool milling and fall upper expansion pipe nipple 1, then be lowered to back-off fishing string, the first jumper pipe 4 is opened and pulled out, then middle expansion pipe nipple 2 is fallen in milling, then is lowered to back-off fishing string, and the second jumper pipe 11 is opened and pulled out, expansion pipe nipple 3 is fallen down in last milling, completes and takes out expansion tube operation.
Below for form the Application Example of single-stage cross-over connection expansion tube in the time that middle expansion pipe nipple 2 and the second jumper pipe 11 are not set:
Oil well casing φ 139.7mm, internal diameter φ 125.74mm, bottom depth 1836.3m.Log well and find 2 sections of casing failures with 16 arm calipers: 1010.7m～1045.4m multi-point deformetion, minimum diameter φ 112mm; 1059.3m～1090.8m multi-point deformetion, minimum diameter φ 108mm.When overhaul, use four milling taper thread grindings milling of different size, two place's deformation points all can be smoothly by φ 120mm milling cone.
Before subsidy, use the drifting of φ 122mm drift size gauge tool, can pass through deformation section.Determine to use single hop cross-over connection expansion tube to implement subsidy.Upper expansion pipe nipple 1, lower expansion pipe nipple 3 wall thickness are 8mm, expansion cone 5 diameter phi 108mm.The first jumper pipe 4 external diameter φ 121mm, internal diameter φ 109mm, 11 jumper pipe total length 90.8m.Expansion tube is gone up expansion pipe nipple 1 expansion point after going into the well and is chosen in 1005.2m～1006m place, and lower expansion pipe nipple 3 expansion point are chosen in 1096.8m～1097.6m place.
Tubing string is by after putting in place under design, and 36MPa～39MPa is suppressed on ground, and lower expansion pipe nipple 3 expands complete.On carry deliver oil pipe 7 expansion cone 5 is entered in the pressurizing chamber of upper expansion pipe nipple 1 by the first jumper pipe 4,36MPa～38MPa is suppressed on ground again, upper expansion pipe nipple 1 expands complete.Trip out after expansion cone 5, lower salvaging pipe is pulled the end out and is blocked up 6, and the construction of all expanding is complete.
The present embodiment has reduced the difficulty of casing damaged well passage processing, detection, has reduced time and workload that overhaul is processed cover and damaged passage.Meanwhile, the expansion tube of the present embodiment 1.6m that only need expand, has reduced construction risk and difficulty.And the present embodiment only needs milling to fall the long upper expansion pipe nipple 1 of 0.8m, then back-off salvages 11 jumper pipes, and the long lower expansion pipe nipple 3 of 0.8m is fallen in last milling, can subsidy after the taking-up of expansion tube, improved the operating efficiency that casing damaged well is repaired.
Further, the internal diameter of above-mentioned the first jumper pipe 4, the second jumper pipe 11, the 3rd pipeline section and the 6th pipeline section is identical respectively with external diameter; The internal diameter of the first pipeline section, the 4th pipeline section and the 7th pipeline section is identical respectively with external diameter; The internal diameter of the second pipeline section, the 5th pipeline section and the 8th pipeline section is identical respectively with external diameter.So, the size of the pipeline section of above-mentioned same function is more unified, is convenient to processing and manufacturing.
Further, upper expansion pipe nipple 1, lower expansion pipe nipple 3, middle expansion pipe nipple 2, the first jumper pipe 4 and the second jumper pipe 11 are metal steel pipe.The tensile strength of metal steel pipe is higher, and the intensity after expansion is better, has improved application life.
In the present invention's one specific embodiment, the length that the length of upper expansion pipe nipple 1, lower expansion pipe nipple 3, middle expansion pipe nipple 2 is all less than 1m, the first jumper pipe 4 and the second jumper pipe 11 is 3m-12m.Each expansion pipe nipple length of the present invention is shorter, and then has shortened expansion length, and the length that simultaneously needs milling to fall in the time that needs take out the expansion tube after subsidizing is shorter, is convenient to take out.
It should be noted that, the above-mentioned length that is of a size of single jumper pipe, the length of single jumper pipe can be the arbitrary numerical value in 3m-12m, also can select according to the actual requirements other length, as 2m, 10m etc.In actual applications, above-mentioned jumper pipe can be one or be connected many.
In order further to optimize above-mentioned embodiment, the screw thread on upper expansion pipe nipple 1, lower expansion pipe nipple 3, middle expansion pipe nipple 2, the first jumper pipe 4 and the second jumper pipe 11 is tightness screw thread.In the present embodiment, there is connecting thread at the two ends of expansion pipe nipple and jumper pipe respectively car, for being connected between jumper pipe and expansion pipe nipple, jumper pipe and jumper pipe, this screw thread is processed into airproof screw thread by the present invention, can ensure good sealing, and then expansion tube is applied in the gas well casing patching in oil field, expand range of application.Certainly,, in the time being applied to oil well, the present invention can also replace with the sealing thread that petroleum casing pipe is conventional by above-mentioned tightness screw thread, reduces costs.
In order to improve the sealing effectiveness between expansion pipe nipple and the sleeve pipe after expansion, the first elastic seal ring 8, the second elastic seal ring 10, the 3rd elastic seal ring 9 are rubber seal, and three is 2-10.Concrete, the present invention is respectively by 2 rubber seal, and the expansion pipe nipple of having realized after expanding is fitted with the sealing of internal surface of sleeve pipe, and subsidy effect is better; Certainly, can also select the rubber seal of other numbers according to the different length of expansion pipe nipple, as 3,5 etc.
In this manual, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an expansion tube, is characterized in that, comprising:
Upper expansion pipe nipple (1), described upper expansion pipe nipple (1) has the first pipeline section and the second pipeline section, the internal diameter of described the first pipeline section is less than the external diameter of expansion cone (5), the external diameter of described the first pipeline section is less than the casing inner diameter of subsidizing well, described the first pipeline section overcoat has the first elastic seal ring (8), and described the first pipeline section expands rear by described the first elastic seal ring (8) and bobbin seal laminating; The internal diameter of described the second pipeline section is not less than the external diameter of described expansion cone (5), and the external diameter of described the second pipeline section is less than the internal diameter of described sleeve pipe, and the inner chamber of described the second pipeline section forms the pressurizing chamber while expansion;
Lower expansion pipe nipple (3), described lower expansion pipe nipple (3) has the 3rd pipeline section, the 4th pipeline section and the 5th pipeline section, the internal diameter of the internal diameter of described the 3rd pipeline section and described the 5th pipeline section is all not less than the external diameter of described expansion cone (5), the external diameter of the external diameter of described the 3rd pipeline section and described the 5th pipeline section is all less than the internal diameter of described sleeve pipe, and the inner chamber of described the 5th pipeline section forms the pressurizing chamber while expansion; The internal diameter of described the 4th pipeline section is less than the external diameter of described expansion cone (5), the external diameter of described the 4th pipeline section is less than the internal diameter of described sleeve pipe, described the 4th pipeline section overcoat has the second elastic seal ring (10), and described the 4th pipeline section expands rear by described the second elastic seal ring (10) and described bobbin seal laminating;
The first jumper pipe (4), the upper end of described the first jumper pipe (4) is threaded with described the second pipeline section, the lower end of described the first jumper pipe (4) is threaded with described the 3rd pipeline section, the internal diameter of described the first jumper pipe (4) is not less than the external diameter of described expansion cone (5), and the external diameter of described the first jumper pipe (4) is less than the internal diameter of described sleeve pipe.
2. expansion tube as claimed in claim 1, is characterized in that, also comprises:
Be arranged on the middle expansion pipe nipple (2) between described upper expansion pipe nipple (1) and described lower expansion pipe nipple (3), described middle expansion pipe nipple (2) has the 6th pipeline section, the 7th pipeline section and the 8th pipeline section, the internal diameter of the internal diameter of described the 6th pipeline section and described the 8th pipeline section is all not less than the external diameter of described expansion cone (5), the external diameter of the external diameter of described the 6th pipeline section and described the 8th pipeline section is all less than the internal diameter of described sleeve pipe, and the inner chamber of described the 8th pipeline section forms the pressurizing chamber while expansion; The internal diameter of described the 7th pipeline section is less than the external diameter of described expansion cone (5), the external diameter of described the 7th pipeline section is less than the internal diameter of described sleeve pipe, described the 7th pipeline section overcoat has the 3rd elastic seal ring (9), and after described the 7th pipeline section expands,, by described the 3rd elastic seal ring (9) and described bobbin seal laminating, the lower end of described the first jumper pipe (4) is threaded with described the 6th pipeline section;
Be arranged on the second jumper pipe (11) between described lower expansion pipe nipple (3) and described middle expansion pipe nipple (2), the upper end of described the second jumper pipe (11) is threaded with described the 8th pipeline section, and the lower end of described the second jumper pipe (11) is threaded with described the 3rd pipeline section.
3. expansion tube as claimed in claim 2, is characterized in that, the internal diameter of described the first jumper pipe (4), described the second jumper pipe (11), described the 3rd pipeline section and described the 6th pipeline section is identical respectively with external diameter.
4. expansion tube as claimed in claim 3, is characterized in that, the internal diameter of described the first pipeline section, described the 4th pipeline section and described the 7th pipeline section is identical respectively with external diameter.
5. expansion tube as claimed in claim 3, is characterized in that, the internal diameter of described the second pipeline section, described the 5th pipeline section and described the 8th pipeline section is identical respectively with external diameter.
6. expansion tube as claimed in claim 2, is characterized in that, described upper expansion pipe nipple (1), described lower expansion pipe nipple (3), described middle expansion pipe nipple (2), described the first jumper pipe (4) and described the second jumper pipe (11) are metal steel pipe.
7. expansion tube as claimed in claim 2, is characterized in that,
The length of described upper expansion pipe nipple (1), described lower expansion pipe nipple (3), described middle expansion pipe nipple (2) is all less than 1m;
The length of described the first jumper pipe (4) and described the second jumper pipe (11) is 3m-12m.
8. expansion tube as claimed in claim 2, it is characterized in that, the screw thread on described upper expansion pipe nipple (1), described lower expansion pipe nipple (3), described middle expansion pipe nipple (2), described the first jumper pipe (4) and described the second jumper pipe (11) is tightness screw thread.
9. expansion tube as claimed in claim 2, is characterized in that, described the first elastic seal ring (8), described the second elastic seal ring (10), described the 3rd elastic seal ring (9) are rubber seal, and three is 2-10.
10. the expansion tube as described in claim 2-9 any one, is characterized in that,
Described upper expansion pipe nipple (1) and described lower expansion pipe nipple (3) are one;
Described middle expansion pipe nipple (2) is multiple, and connects by described the second jumper pipe (11) between adjacent two described middle expansion pipe nipples (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410136294.0A CN103867155B (en) | 2014-04-04 | 2014-04-04 | A kind of expansion tube |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410136294.0A CN103867155B (en) | 2014-04-04 | 2014-04-04 | A kind of expansion tube |
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| CN103867155A true CN103867155A (en) | 2014-06-18 |
| CN103867155B CN103867155B (en) | 2016-05-25 |
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| CN201410136294.0A Expired - Fee Related CN103867155B (en) | 2014-04-04 | 2014-04-04 | A kind of expansion tube |
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| CN110439491A (en) * | 2019-08-23 | 2019-11-12 | 华鼎鸿基石油工程技术(北京)有限公司 | Packer expanding expandable casing patching tool |
| CN117662051A (en) * | 2024-01-31 | 2024-03-08 | 大庆金祥寓科技有限公司 | Repair reinforcing tool and repair reinforcing process for high-strength expansion jumper of fractured well |
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| CN103867155B (en) | 2016-05-25 |
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